4. Sabines Geburtstagsultra

Sabines Geburtstagsultra is a small trail ultra in Otzberg, Germany, featuring a 48.6 km race composed of six 8.1 km laps. Each lap is predominantly off-road, utilizing forest paths, gravel, and singletrack, with only approximately 400 meters of asphalt. The course is hilly, accumulating 1,080 meters of elevation gain, and participants have 8 hours and 30 minutes to complete it. This is a low-key birthday ultra with a participant limit of 25 and a history of small fields, typically ranging from a dozen to a couple dozen runners. There is no set entry fee; participants are asked only for a small voluntary donation to cover the certificate, results list, and finisher beer. Finishers receive their certificate immediately, aligning with the event's informal atmosphere. Across its editions, 51 individuals have finished the race, with 31 men and 20 women recorded in the results.